A new method for the simultaneous enhancement of methane yield and reduction of hydrogen sulfide production in the anaerobic digestion of waste activated sludge

Dai, Xiaohu; Hu, Chongliang; Dong, Zhang; Chen, Yinguang

doi:10.1016/j.biortech.2017.07.036

Cited by 57 publications

(8 citation statements)

References 46 publications

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“…initial nitrite concentrations or controlled pH levels ( Figure S3, Supporting Information), which was consistent with the results reported previously (Ma et al, 2015;Wang et al, 2016a). However, previous investigations showed that the presence of FNA could inhibit the activities of a broad range of microbes such as ammonia-oxidizing bacteria, nitrite-oxidizing bacteria, and sulfate-reducing bacteria (Wang et al, 2017a;Wang et al, 2016;Dai et al, 2017a;Dai et al, 2017b). Thus, the potential effect of FNA on the activities of the microbes relevant to these bio-processes was also assessed via a series of batch tests using model compounds as fermentation substrates and anaerobic microbes treated by different concentrations of FNA as inocula.…”

Section: A C C E P T E D Accepted Manuscriptsupporting

confidence: 91%

Free nitrous acid promotes hydrogen production from dark fermentation of waste activated sludge

et al. 2018

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Simultaneous sludge fermentation and nitrite removal is an effective approach to enhance nutrient removal from low carbon-wastewater. It was found in this work that the presence of nitrite largely promoted hydrogen production from acidic fermentation of waste activated sludge (WAS). The results showed that with an increase of nitrite from 0 to 250 mg/L, the maximal hydrogen yield increased from 8.5 to 15.0 mL/g VSS at pH 5.5 fermentation and 8.1-13.0 mL/g VSS at pH 6 fermentation. However, the maximal hydrogen yield from WAS fermentation at pH 8 remained almost constant (2.9-3.7 mL/g VSS) when nitrite was in the range of 0-250 mg/L. Further analyses revealed that free nitrous acid (FNA) rather than nitrite was the major contributor to the promotion of hydrogen yield. The mechanism investigations showed that FNA not only accelerated the disruption of sludge cells but also promoted the biodegradability of organics released, thereby provided more biodegradable substrates for subsequent hydrogen production. Although FNA inhibited activities of all microbes involved in the anaerobic fermentation, its inhibitions to hydrogen consumers were much severer than those to hydrolytic microorganisms and hydrogen producers. Further investigations with microbial community showed that FNA increased the abundances of hydrogen producers (e.g., Citrobacter sp.) and denitrifiers (e.g., Dechloromonas sp.), but reduced the abundances of hydrogen consumers (e.g., Clostridium_aceticum). This work demonstrated for the first time that FNA in WAS fermentation systems enhanced hydrogen production. The findings obtained expand the application field of FNA and may provide supports for sustainable operation of wastewater treatment plants.

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Section: A C C E P T E D Accepted Manuscriptsupporting

confidence: 91%

Free nitrous acid promotes hydrogen production from dark fermentation of waste activated sludge

et al. 2018

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“…In fact, the growth of these bacteria was expedited at these temperatures and increased the sulfate reduction process. Figure depicts that SRB have been found in salt caverns, depleted hydrocarbon reservoir rocks, and saline aquifers which can generate H 2 S in the system. ,− Some storage rocks have shown high H 2 S generation when compared to the allowable limit.…”

Section: Prospect Of Underground H 2 Storage In Salt Formationmentioning

confidence: 99%

Toward a Fundamental Understanding of Geological Hydrogen Storage

Aftab

Hassanpouryouzband

Xie

et al. 2022

Ind. Eng. Chem. Res.

120

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Geological H 2 storage plays a central role to enable the successful transition to the renewable H 2 economy and achieve net-zero emission in the atmosphere. Depleted oil and gas reservoirs are already explored with extensive reservoir and operational data. However, residual hydrocarbons can mix with injected H 2 in the reservoirs. Furthermore, low density and high diffusivity of H 2 may establish H 2 leakage from the reservoirs via fault pathways. Interestingly, H 2 can be consumed by microorganisms, which results in pore-network precipitation, plugging, and partial permeability impairment. Therefore, stored H 2 may be lost in the formations if the storage scenario is not planned cautiously. While salt caverns are safe and commercially proven geo-rock for H 2 storage, they have low-storage capacity compared to depleted gas reservoirs. Moreover, salt structures (e.g., domel, bedded) and microorganisms activities in the salt cavern are limiting factors, which can influence the storage process. Accordingly, we discuss challenges and future perspectives of hydrogen storage in different geological settings. We also highlight geographical limitations with diverse microbial communities and theoretical understanding of abiotic transformation (in terms of rock's minerals, i.e., mica and calcite) for geological H 2 storage. Regarding the fundamental behavior of H 2 in the geological settings, it is less soluble in formation water; therefore, it may achieve less solubility trapping compared to CO 2 and CH 4 . Furthermore, H 2 gas could attain higher capillary entrance pressures in porous media over CH 4 and CO 2 due to higher interfacial tension. Additionally, the low viscosity of H 2 may facilitate its injection and production but H 2 may establish the secondary trapping and viscous fingering. Thus, this review documents a blend of key information for the amendment of subsurface H 2 storage at the industrial scale.

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“…Microbial community changes in WSS was evaluated by MiSeq analysis targeting 16S metagenomics. In control WSS, Thiotrichales found as an abundant population has been reported to be a sulphur-oxidizing bacterium in activated sludge (Zhang et al 2017). Thiobacterales which is a sulphur-oxidizing bacterium and Sphingobacteriales which belongs to Bacteroidetes phylum are commonly found in the anaerobic digestion process of sludge (Bomberg et al 2016).…”

Section: Changes Of Microbial Activity and Community By Aso Limonitementioning

confidence: 99%

“…In addition, these odorous gases are harmful to humans through direct irritations or psychopathologic mechanisms (Schiffman and Williams 2005) and have a negative impact on methane fermentation as a high concentration of hydrogen sulfide lowers the quality of biogas production (Zhou et al 2016) as well as the ammonia triggers to accumulate the organic acids (Wu et al 2016). Therefore, the removal of hydrogen sulfide and ammonia during the anaerobic digestion of WSS is essential to the long-term operation of anaerobic digestion (Dai et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Effect of Aso limonite on anaerobic digestion of waste sewage sludge

2020

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The effect of Aso volcanic limonite was explored in anaerobic digestion using waste sewage sludge (WSS). In this study, methane and hydrogen sulfide were remarkably inhibited when Aso limonite was mixed with WSS as well as a significant reduction of ammonia. Although pH was lowered after adding Aso limonite, methane was still inhibited in neutralized pH condition at 7.0. Hydrolysis stage was not influenced by Aso limonite as supported by the result that a high protease activity was still detected in the presence of the material. However, acidogenesis stage was affected by Aso limonite as indicated by the different productions of organic acids. Acetic acid, was accumulated in the presence of Aso limonite due to the inhibition of methane production, except in the highest concentration of Aso limonite which the production of acetate may be inhibited. Besides, the production of propionate and butyrate reduced in accordance to the increased concentration of Aso limonite. In addition, Archaeal activity (methanogens) in WSS with Aso limonite was low in agreement with the low methane production. Thus, these results indicate that Aso limonite influences the acidogenesis and methanogenesis processes, by which the productions of methane and ammonia were inhibited. On the other hand, in the contactless of Aso limonite during the anaerobic digestion of WSS (Aso limonite was placed in the area of headspace in the vial), Aso limonite had the adsorptive ability for hydrogen sulfide from WSS, but not for methane. This contactless system of Aso limonite may be a practical means to remove hydrogen sulfide without inhibiting methane production as an important bioenergy source. Publisher's NoteSpringer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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A new method for the simultaneous enhancement of methane yield and reduction of hydrogen sulfide production in the anaerobic digestion of waste activated sludge

Cited by 57 publications

References 46 publications

Free nitrous acid promotes hydrogen production from dark fermentation of waste activated sludge

Free nitrous acid promotes hydrogen production from dark fermentation of waste activated sludge

Toward a Fundamental Understanding of Geological Hydrogen Storage

Effect of Aso limonite on anaerobic digestion of waste sewage sludge

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